Chapter 602: Re-Enactment of the Crime Scene

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The body was taken away, and Professor Chen wanted to follow the body.

He was an autopsy, which essentially meant dealing with corpses. Crime scenes were not really his business scope.

Jiang Yuan was reluctant to use the temporary skills he had just used, and said, "I want to take another look. It's been a long time since I saw the front-line scene. When I go back, I have to look at photos again."

More than 500 minutes, the skill is improved by 1 point, and the understanding of the case and crime scene reconstruction skills will be improved.

"Uh... okay." Professor Chen was a little embarrassed, so he stayed.

The smell at the scene was strong, not only the smell of blood, but also the smell of unclean kitchens and restaurants, which kept drifting in.

The weak light in the restaurant was replaced by several bright headlights. The headlights were pure white and blazing like a middle-aged man's crotch full of oysters, trying to make the most of the limited time.

Jiang Yuan calculated while observing the scene.

Compared with looking at photos, the smell at the scene is also one of the bases for judgment. In addition, it is difficult to observe the coagulation degree of semi-dried bloodstains or the softness of the pooled blood from photos.

Observing the time of death through blood is actually a very mature technology, and there are multiple indicators in multiple dimensions that can be used for judgment.

Similar to bloodstain analysis, many old detectives are experts in this area, and they are better than old scholars like Professor Chen.

In the early years, when encountering homicide cases or robbery cases with bloodstains, old detectives often need to accurately calculate the time of death in hours.

In the years when there were many cases, there was actually no need for special practice. After catching the murderer and interrogating him, after determining the time of death, reverse checking the bloodstains at the scene. With this method, you will soon be familiar with the relationship between bloodstains and the time of death. This can even be called the part where practice makes perfect.

Now there are more means of handling cases, and bloodstains are not so valuable. Its most special significance of crime scene reconstruction has been partially transferred to cameras, and partially forgotten.

Jiang Yuan looked at the scene and simulated the scene in his mind.

Since the bloodstains under the body were confirmed, the scene in Jiang Yuan's mind became more complete.

Based on his recent experience in handling eucalyptus, Jiang Yuan was not modest in this regard. After confirming it, he said directly: "I will do an analysis of the scene reconstruction. Can everyone have a basic concept to facilitate the investigation of the case later?"

"Okay." When Huang Qiangmin was selling Jiang Yuan in other cities and counties, he saw Jiang Yuan doing similar performances. At that time, he especially wanted Ningtai County, and there was such an opportunity.

Before, there was no suitable eucalyptus in the country. This time, Jiang Yuan took the initiative to propose it, and Huang Qiangmin seemed a little happy.

Other criminal police who had seen it and those who had not seen it also came together.

Someone else asked, "Can we record it?"

"Yes. And we must record it. Two more people will label and take photos, so that the information will be clearer later." Jiang Yuan answered, and then stood a few meters away from the body and said, "I'm starting. This is the starting point of the conflict. Mark it."

A policeman took a yellow-bottomed white label with the number 101 and placed it at the place Jiang Yuan pointed. The criminal technician next to him took a photo and recorded it. At the same time, the camera next to him continued to record without stopping.

The scene was in a state where all samples had been taken. Jiang Yuan took two steps back and said:

"The victim and the number one perpetrator should have suddenly clashed. At the beginning, both sides may have some restraint, and some tables, chairs and benches were damaged. Personal injuries cannot be determined."

"As the number one perpetrator lost control, he suddenly increased his strength in the conflict, causing the victim to hit the wall."

"The victim fell on the spot. At this time, the number one perpetrator came forward to check, and the first drag was formed at this time. Because the victim's bleeding was not that large, the wiped blood stains were not so obvious."

When Professor Chen heard this, he couldn't help but come forward to observe and said directly: "I didn't notice that there were wiped blood stains here just now."

Jiang Yuan nodded, leaned over and pointed, and asked to take a photo, and then said: "Later, this wiped blood stain was equivalent to being covered by the pool of blood, but because the pool of blood was formed relatively late, it can still be judged."

Professor Chen looked carefully and nodded slowly. Although he had been away from the front line for a long time, Professor Chen knew that even if he was in peak condition, it would not be easy to discover this.

The blood pool was formed more than an hour later than the wiping trace, so the bloodstains have different depths. This alone can explain a lot of problems.

Jiang Yuan said at this time: "In fact, if you look carefully, the blood pools were formed twice."

Professor Chen was shocked. He has been a teacher for too long and habitually refuted: "You can't infer evidence from the results. There is no need to make this judgment. Even if there are two pools of blood, it is difficult to say that they were formed twice."

Jiang Yuan smiled and said: "I judged from insects."

"Huh?"

"When the first small pool of blood was formed, insects such as ants came to wade in the muddy water." Jiang Yuan described it briefly, squatted in front of the blood pool, looked at it again with a horseshoe mirror, and said: "These tiny scratches are actually left by ants and other insects. Then they were covered by the blood later."

Professor Chen looked hard for a while and said helplessly: "As I get older, my eyes are no longer good and I can't see clearly."

He didn't fully admit it, but he couldn't deny Jiang Yuan's point of view.

Jiang Yuan was no longer a student in the school, and he didn't need Professor Chen's recognition. He then took a few more steps and said, "This is most likely the escape route of the perpetrator No. 1."

Because Abuser No. 1 is currently a mental patient, this road map is not easily verified.

Jiang Yuan didn't say anything more about this. Strictly speaking, Han Shengyan, who had surrendered, was no longer a problem. Unless he really didn't do it and was mentally ill and talking nonsense, otherwise, the part that requires Han Shengyan to be the person in charge does not require much evidence to support it.

Moreover, considering that most of the outside of the restaurant is hardened, and some stores also have external cameras, etc., if you go back and check carefully, you should be able to find Han Shengyan - mentally ill people will definitely not do too much counter-reconnaissance. flower head.

"Where is the perpetrator No. 2?" Liu Wenkai of the No. 2 Squadron was listening with excitement and was anxious to know the follow-up.

Jiang Yuan walked back to the position opposite the original body and said, "As for the perpetrator No. 2, he should have arrived here about an hour and a half after No. 1."

Jiang Yuan carefully took two steps forward, made a movement that simulated bending over, put his hand forward, and said: "This is the location where the second drag occurred. At this time, the victim did not bleed a lot. Look at the wiping The blood stains are visible."

"The second attacker checked on the victim at this time. He probably had a conversation with the victim. At least the victim was alive at the time, otherwise there would be no need to attack again."

"The victim suffered another trauma to the back of his head and died."

…

Jiang Yuan explained several detailed points in detail, and then directed the technicians to take samples again, and the on-site investigation was truly completed.

Everyone went back home, while the Criminal Division personnel processed the evidence, and the criminal police went around and began to explore the victim's interpersonal relationships.

Professor Chen and Jiang Yuan rushed to the funeral parlor and dissected the body at night.

The most important thing to check is the wound on the back of the victim's head.

Together, with the encouragement of the incense burned by Wu Jun, the two men quickly scalped the corpse.

Looking at the scalp first, you can see a rectangular central contusion and some exfoliation.

The uncovered scalp is very thin, similar in thickness and feel to a leather wallet. It is slightly slippery. After being soaked with a little saline, it has gained a certain degree of toughness. Doing this will help sew the body back together later.

In addition, there are some debris near the scalp, which are also collected for examination.

"It was indeed multiple blows." Jiang Yuan came to a definite conclusion after scraping his skull.

This time, Professor Chen was more confident and said: "And they were all flat blows. Judging from the position, the second murderer probably lifted the victim's head and knocked it down hard."

"Well, the second perpetrator is likely to have a strong relationship with the victim." Jiang Yuan breathed a sigh of relief and said to Mu Zhiyang, who was waiting next to him: "Following the network of relationships, you may gain something."